Most of the carbon dioxide produced in the tissues is transported to the lungs as______
A
bicarbonates
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B
attached to haemoglobin
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C
carbonates
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D
dissolved in the blood
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Solution
The correct option is A bicarbonates Most of the carbon dioxide (~70%) is transported from tissue to the lungs as bicarbonates. 20-25% of carbon dioxide is transported as carbamino-haemoglobin attached to haemoglobin.